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Finding the Fourth Proportional to 111,703.76, 154,149 and 61,403.60

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Solution

The fourth proportional to 111,703.76, 154,149 and 61,403.60 is: 84,735.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,703.76 : 154,149 = 61,403.60 : x
  2. Step 2: Convert to fraction form
    111,703.76/154,149 = 61,403.60/x
  3. Step 3: Cross multiply
    111,703.76x = 154,149 × 61,403.60
  4. Step 4: Simplify right side
    111,703.76x = 9,465,303,536.40
  5. Step 5: Solve for x
    x = 9,465,303,536.40/111,703.76
  6. Step 6: Final answer
    x = 84,735.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.